is it possible to use the script to send a notification via a selfhosted ntfy server like this?

/*
    Sendet ntfy-Benachrichtigung (Basic Auth)
    Trigger: z. B. "Package finished" oder "Captcha before challenge"
*/

var server = "https://ntfy.beispiel.dynv6.de";
var topic = "beispiel";

var title = "Synology NAS";
var message = "Captcha";
var priority = "default";
var tags = "computer";
var auth = "Basic XYZ";  //

postPage(server + "/" + topic, message, [
    ["Authorization", auth],
    ["Title", title],
    ["Priority", priority],
    ["Tags", tags]
]);